SRS tries to optimize the number of reviews you need to recall an item. You could review a word 100 times in 100 days, but it is not really necessary (and very inefficient if the number of words you want to learn is >100 or something).
If you learn a new word once, it is unlikely that you remember it 6 months later. You need to repeat it. So you will repeat it 4 hours later, 8 hours later, one day later … For some words maybe you have already learned it to recognize it a few months later, but for others the SRS needs to recognize that you have a problem with the word to repeat it a few times more.
If you just look it up before the review it is not different from learning it brand new, you will recall it 4 hours later. But the SRS will think that you have no problem with the word
Note however that if you see the word while reading something it is no problem, you just add more “reviews” than strictly necessary. You just shouldn’t answer reviews in the WK SRS correctly for words you had no clue what they mean just before